摘要
将计算雷达散射截面的板块元方法引入到声呐目标强度计算中。在应用Kirchhoff近似计算水中目标散射声场时,用一组平面板块元近似复杂形状目标曲面,所有板块元的散射声场的和就是总散射声场的近似值。通过将单个板块元的积分化为代数和避免了面积分运算,使得板块元法比通常的面元积分法计算速度提高许多倍。针对声呐的情况将此方法推广到目标近场和非刚性表面回声特性预报。用这种方法解决了多种声呐目标的回声计算并开发了专用软件,能够快速计算各种形状声呐目标的目标强度。
The planar elements method for calculating Radar Cross Section（RCS） is introduced to calculate sonar target strength（TS）.When the Kirchhoff approximate formula is used to calculate the sound scattering fields from submerged targets,the complex target surface is fitted by using the planar elements,the sum of the scattering fields from the planar elements is equal to the total fields from the complex target approximately.The surface integral calculation can be avoided by converting the integral of a planar element to the sum of a planar element vertexes coordinate value,so computing speed can be increased greatly.In case of sonar application,the method is generalized to forecast the echo characteristics of the near fields and non-rigid surface targets.The special software based on the planar elements method is developed for calculating sonar echo characteristics from sonar targets with various shapes rapidly.
出处
《船舶力学》
EI
北大核心
2012年第1期171-180,共10页
Journal of Ship Mechanics
基金
国家重大基础研究项目资助(6131221-02)
关键词
声呐
回声特性
板块元方法
sonar
the echo characteristics
the planar elements method
